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percpu: move arch XX_PER_CPU_XX definitions into linux/percpu.h
- Special consideration for IA64: Add the ability to specify arch specific per cpu flags - remove .data.percpu attribute from DEFINE_PER_CPU for non-smp case. The arch definitions are all the same. So move them into linux/percpu.h. We cannot move DECLARE_PER_CPU since some include files just include asm/percpu.h to avoid include recursion problems. Cc: Rusty Russell <[email protected]> Cc: Andi Kleen <[email protected]> Signed-off-by: Christoph Lameter <[email protected]> Signed-off-by: Mike Travis <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
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8 changed files with 26 additions and 120 deletions
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@ -16,28 +16,11 @@
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#include <linux/threads.h>
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#ifdef HAVE_MODEL_SMALL_ATTRIBUTE
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# define __SMALL_ADDR_AREA __attribute__((__model__ (__small__)))
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#else
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# define __SMALL_ADDR_AREA
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# define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__)))
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#endif
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#define DECLARE_PER_CPU(type, name) \
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extern __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name
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/* Separate out the type, so (int[3], foo) works. */
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#define DEFINE_PER_CPU(type, name) \
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__attribute__((__section__(".data.percpu"))) \
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__SMALL_ADDR_AREA __typeof__(type) per_cpu__##name
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#ifdef CONFIG_SMP
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#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
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__attribute__((__section__(".data.percpu.shared_aligned"))) \
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__SMALL_ADDR_AREA __typeof__(type) per_cpu__##name \
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____cacheline_aligned_in_smp
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#else
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#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
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DEFINE_PER_CPU(type, name)
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#endif
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extern PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
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/*
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* Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an
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@ -68,9 +51,6 @@ extern void *per_cpu_init(void);
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#endif /* SMP */
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#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
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#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
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/*
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* Be extremely careful when taking the address of this variable! Due to virtual
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* remapping, it is different from the canonical address returned by __get_cpu_var(var)!
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